Proton number & Nucleon number

Proton number is the number of protons in the nucleus an atom.

Proton number is also known as atomic number.

proton number

 

 

 

 

Nucleon number is the number of protons and the number of neutrons in the nucleus an atom.

Nucleon number is also known as mass number.

nucleon number

 

Note: From this equation, we can derive another 2 equations to calculate the number of neutrons & the number of protons.

Number of neutrons = nucleon number – number of protons (proton number)

Number of protons (Proton number) = nucleon number – number of neutrons